[GHC] #14675: GHC 8.4.1 regression: segfault when loading doctest on a module with ANNs on Ubuntu 16.04 or later

[GHC]

#14675: GHC 8.4.1 regression: segfault when loading doctest on a module with ANNs
on Ubuntu 16.04 or later
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  alpmestan
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.4.1
       Component:  GHC API           |              Version:  8.4.1-alpha1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14603            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by alpmestan):

 Here's what I have:

 {{{#!haskell
 alp at vm:~/ghc$ cat /opt/ghc/8.2.2/lib/ghc-8.2.2/settings | grep ld
  ("C compiler link flags", " -fuse-ld=gold"),
  ("ld command", "ld.gold"),
  ("ld flags", ""),
  ("ld supports compact unwind", "YES"),
  ("ld supports build-id", "YES"),
  ("ld supports filelist", "NO"),
  ("ld is GNU ld", "YES"),
 alp at vm:~/ghc$ cat /opt/ghc/8.4.1/lib/ghc-8.4.0.20171222/settings | grep ld
  ("C compiler link flags", " -fuse-ld=gold"),
  ("ld command", "ld.gold"),
  ("ld flags", ""),
  ("ld supports compact unwind", "YES"),
  ("ld supports build-id", "YES"),
  ("ld supports filelist", "NO"),
  ("ld is GNU ld", "YES"),
 }}}

 And my custom build reports the same thing as well.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14675#comment:9>
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